The 26-year-old man who was charged with murder in the assassination of a health insurance executive in Midtown Manhattan was denied bail today. The suspect, Luigi Mangione, is fighting extradition to New York, meaning that he could spend the next several weeks at a prison in Pennsylvania near the city where he was arrested. Here’s the latest.

The authorities are still trying to retrace the steps of Mangione, who they have accused of fatally shooting Brian Thompson, the chief executive of UnitedHealthcare. The suspect was found with a three-page manifesto, in which the health insurance industry was described as “parasitic,” the police said.

Mangione saw himself as a hero fighting a corrupt health insurance industry, the authorities said in an internal report obtained by The Times. The manifesto indicated that he saw the killing as a direct challenge to the health care industry’s “alleged corruption and ‘power games.’” The police also expressed concern that the attack could inspire violence against similar executives or other extreme behavior.

Here’s what we know about the suspect: Mangione had described a series of life-altering health problems. He was a high school valedictorian and an Ivy League tech graduate from a prominent Maryland family. The subject of a missing-person report filed in San Francisco by his mother last month, he had stopped communicating with friends and family about six months ago.